<!DOCTYPE html>
<html>

<head>
    <meta charset="utf-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <title>Page Title</title>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>login</title>
</head>

<body>

    <script>
        // This is called with the results from from FB.getLoginStatus().
        function statusChangeCallback(response) {
            console.log('statusChangeCallback');
            console.log(response);
            // The response object is returned with a status field that lets the
            // app know the current login status of the person.
            // Full docs on the response object can be found in the documentation
            // for FB.getLoginStatus().
            if (response.status === 'connected') {
                // Logged into your app and Facebook.
                testAPI();
            } else {
                // The person is not logged into your app or we are unable to tell.
                document.getElementById('status').innerHTML = 'Please log ' +
                    'into this app.';
            }
        }

        // This function is called when someone finishes with the Login
        // Button.  See the onlogin handler attached to it in the sample
        // code below.
        function checkLoginState() {
            FB.getLoginStatus(function(response) {
                statusChangeCallback(response);
            });
        }

        window.fbAsyncInit = function() {
            FB.init({
                appId: '2172102389473177',
                cookie: true, // enable cookies to allow the server to access 
                // the session
                xfbml: true, // parse social plugins on this page
                version: 'v2.8' // use graph api version 2.8
            });

            // Now that we've initialized the JavaScript SDK, we call 
            // FB.getLoginStatus().  This function gets the state of the
            // person visiting this page and can return one of three states to
            // the callback you provide.  They can be:
            //
            // 1. Logged into your app ('connected')
            // 2. Logged into Facebook, but not your app ('not_authorized')
            // 3. Not logged into Facebook and can't tell if they are logged into
            //    your app or not.
            //
            // These three cases are handled in the callback function.

            FB.getLoginStatus(function(response) {
                statusChangeCallback(response);
            });

        };

        // Load the SDK asynchronously
        (function(d, s, id) {
            var js, fjs = d.getElementsByTagName(s)[0];
            if (d.getElementById(id)) return;
            js = d.createElement(s);
            js.id = id;
            js.src = "https://connect.facebook.net/en_US/sdk.js";
            fjs.parentNode.insertBefore(js, fjs);
        }(document, 'script', 'facebook-jssdk'));

        // Here we run a very simple test of the Graph API after login is
        // successful.  See statusChangeCallback() for when this call is made.
        function testAPI() {
            console.log('Welcome!  Fetching your information.... ');
            FB.api('/me', function(response) {
                console.log('Successful login for: ' + response.name);
                document.getElementById('status').innerHTML =
                    'Thanks for logging in, ' + response.name + '!';
            });
        }
    </script>

    <!-- Below we include the Login Button social plugin. This button uses
        the JavaScript SDK to present a graphical Login button that triggers
        the FB.login() function when clicked. -->

    <fb:login-button scope="public_profile,email" onlogin="checkLoginState();">
    </fb:login-button>

    <div id="status">
    </div>


</body>

</html>